Initial Sulfate Solubility Study for Sludge Batch 4 (SB4)

PDF Version Also Available for Download.

Description

The objective of this task is to provide the Defense Waste Processing Facility (DWPF) of the Savannah River Site (SRS) with an assessment of the viability of using the current 0.6 wt% SO{sub 4}{sup =} limit (in glass) and/or the possibility of increasing the SO{sub 4}{sup =} solubility limit to account for anticipated sulfur concentrations in Sludge Batch 4 (SB4). The 0.6 wt% SO{sub 4}{sup =} limit was implemented for processing of Frit 418-Sludge Batch 3 (SB3) to avoid the formation of sulfate inclusions in the glass and/or the formation of a molten sulfate-rich phase on the melt pool in ... continued below

Creation Information

Lorier, T April 1, 2005.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Author

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The objective of this task is to provide the Defense Waste Processing Facility (DWPF) of the Savannah River Site (SRS) with an assessment of the viability of using the current 0.6 wt% SO{sub 4}{sup =} limit (in glass) and/or the possibility of increasing the SO{sub 4}{sup =} solubility limit to account for anticipated sulfur concentrations in Sludge Batch 4 (SB4). The 0.6 wt% SO{sub 4}{sup =} limit was implemented for processing of Frit 418-Sludge Batch 3 (SB3) to avoid the formation of sulfate inclusions in the glass and/or the formation of a molten sulfate-rich phase on the melt pool in the DWPF melter. The presence of such a phase on the surface of the melt pool increases corrosion rates of melter components, enhances the potential for steam excursions in a slurry-fed waste glass melter, and creates the potential for undesirable current paths that could deplete energy delivered to the melter due to the electrical conductivity of the molten salt layer. This suite of sulfate-solubility tests began by testing the 1200-canister, 2nd transfer case for SB4 (as defined by Lilliston and Shah, 2004)--based on this being the most conservative (having the highest predicted viscosity when coupled with specific frits, it could potentially have the greatest impact on SO{sub 4}{sup =} solubility) blending scenario of SB4 with the heel of SB3 for SO{sub 4}{sup =} solubility. Frits 320 and 418 were tested with SB4 and the tests indicated that at the current SO{sub 4}{sup =} limit (in glass) and the tested waste loadings (30% and 40%), neither Frit 320 nor Frit 418 could be utilized with SB4 (for the 1200-canister, 2nd transfer case composition originally provided). More specifically, SO{sub 4}{sup =} was observed on the surface with the SB4 composition and Frit 320 at 40% waste loading (WL) and 0.6 wt% SO{sub 4}{sup =}, and with Frit 418 at 30% and 40% WL and 0.5 wt% SO{sub 4}{sup =}. As alternative frits were being developed--Frits 447, 448, and 449, that contained CaO and/or V2O5 to enhance SO{sub 4}{sup =} solubility based on suggestions of previous studies--testing began of the 1100-canister, 1st transfer case for SB4 (from Lilliston, 2005), which is the baseline flowsheet for the DWPF. The results of the study with the revised compositions have indicated that the SO{sub 4}{sup =} solubility limit in the DWPF of 0.6 wt% can be applicable for the 1100-canister, 1st transfer case of SB4 for certain frits. Five frits were tested in closed-crucible studies--Frits 320, 418, 447, 448, and 449. Tests with Frit 418 showed that SO{sub 4}{sup =} was apparent on the glass surface of tests at 40% WL and 0.6 wt% SO{sub 4}{sup =}. No salt layer formation was evident in any test (30% or 40% WL) with Frits 320, 447, 448, or 449 until SO{sub 4}{sup =} concentrations of 0.8 wt% were targeted. The crucible tests of this study and model predictions (from Jantzen and Smith, 2004) indicated that the SO{sub 4}{sup =} solubility limit for SB4 with those four frits would be similar. However, even with the additions of CaO and V2O5, the solubility of SO{sub 4}{sup =} was not greatly enhanced by Frits 447, 448, and 449 over Frit 320 for the 1100-canister, 1st transfer case. The following recommendation is made regarding the SO{sub 4}{sup =} solubility limit for SB4 in the DWPF: Reinvestigate the solubility of SO{sub 4}{sup =} for SB4 once the final blending and/or washing strategies for SB4 are determined--based on the decisions for the inclusion of Tank 4 and the exact volume and composition of the Np stream--in order to determine if the current SO{sub 4}{sup =} solubility limit (0.6 wt% SO{sub 4}{sup =}) in the DWPF needs to be increased for the processing of SB4.

Notes

available

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: WSRC-TR-2005-00213
  • Grant Number: DE-AC09-96SR18500
  • DOI: 10.2172/890179 | External Link
  • Office of Scientific & Technical Information Report Number: 890179
  • Archival Resource Key: ark:/67531/metadc882633

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • April 1, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

Description Last Updated

  • Nov. 2, 2016, 12:55 p.m.

Usage Statistics

When was this report last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Lorier, T. Initial Sulfate Solubility Study for Sludge Batch 4 (SB4), report, April 1, 2005; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc882633/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.